No, no really - LCD displays are fundamentally very simple devices - the amount of light transmitted is controlled by the voltage on a pixel. So, simplistically 0 volts = black, 1 Volt = all light transmitted. The 8-bit signal (or more bits in high end displays) just divides that up proportionally, e.g., 0 = 0V, 255= 1 Volt.
When you change the whitepoint of the display, you're changing the voltage that equals 255. So, e.g.,
1. a 9500 whitepoint may mean: Red max voltage = 0.8V, Green max voltage = 1V, Blue max voltage = 1V
1. a 6500 whitepoint may mean: Red max voltage = 0.9V, Green max voltage = 0.9V, Blue max voltage = 1V
Max voltage always equals 255 (in an 8 bit display).
There's no need for a LUT in this process. The display might, depending on how it works internally, use a LUT, but that's not a necessary part of the equation.
Note the above is vastly simplified - e.g., I've left out gamma, black levels, contrast controls, etc. Also most LCD panels (for technical reasons) internally work with 0V = white and max volts = black, etc, but the principle remains the same.
The one thing you need to avoid is setting the display to settings such that it is in saturation, e.g., voltages of above 1V in the example above. How you tell is easy - when you calibrate the panel, check that the transfer curve doesn't have a kink in it at the top or bottom.
Is your described theory valid for all panel types? I've found an article that i think confirms your theory:http://monitordelcd.com/en/monitor/manuten...monitor-de-lcd/
"Controlling the level of voltage applied between the polarized and can vary the level of light that pass through the display.
If all the bits are 0 that subpixel is erased. If some other bits are 0 and 1 are, if the subpixel lights off eight times and very fast so that our eye enxergará a weaker brightness.
Since each subpixel (color) receives 8 bits at a time, he can make 256 levels of brightness"
So to summarize:
The level of voltage between the polarize filters (for each subpixel) determines the color temperature.
The 8 bits define the level of brigthness for R / G / B thus creating a color.
That makes sense checking the options while playing with the white point option.
If i switch between the presets sRGB/6500/9300 there is no change for the RGB values.
So the maximum preset is when the voltage value is maximum?
But why do i need to change the RGB values in BasICColor to achieve a certain color temperature?
This is a totally other approach to change my white point...
Looks like i can change the white point using a hardware way (presets) and using a software way (RGB values)?
Can i conclude if all i said is true that i have 4 native white points? My 4 presets...